COMBUSTION TYPE POWER HEATER SYSTEM ECU Power Source Circuit

DTC Code DTC Name
ECU Power Source Circuit

DESCRIPTION

This is the power source circuit for the heater assembly (ECU).

WIRING DIAGRAM

E176183E18

CAUTION / NOTICE / HINT

Note:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Tip:

Before performing the following procedures, check the battery and generator assembly and confirm that they are operating normally.

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - BATTERY AND BODY GROUND)

    1. U123702E02

      Disconnect the A41 heater connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A41-5 (B) - Body ground

      Always

      11 to 14 V

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A41-1 (E) - Body ground

      Always

      Below 1 Ω
    Table 1. Text in Illustration

    *1

    Front view of wire harness connector

    (to Heater Assembly)

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR